Veneer-cutting machine



v Aug. 12, 1930. MEN 'E 1,772,726

VENEERCUITING 11110111115 Filed Dec. 31. 1927 2 Sheets-Sheet 1 "vi Mon vM16214:

Aug. 12, 1930.

J. T. MENGEL VENEER CUTTING IAQHINB Filed Dec. :51, 1927 2 Shoots-Swot II INVENTORQ ATTORNEY from a straight line being sufficient to causePatented Aug. 12,

" i 3 GER HQiiiiI QL T -I NESS F I fvniinnaeu'mme r 7 Application filedDecember 31,1927. semi-no. 244,007.

a This invention relates to machines: for cutting veneer from logsor.b1ocks or sections of wood, themachine comprising a knife which isadapted to cut from the face of the wood a thin sheet orlayer of woodwhile the piece of'wood and ithe knife are movedjrelative toaeh other,the knife bear ing onthe surface "of the W0Od., i

The object of this invention is to produce a machine which is adapted tocut the wood along a sinuous or wavy line, the variations parts of thecutting to be in orthrough one fiber layer. of the wood while otherportions of the cutting are in another layer or layers of the woodfiber, such cutting resultingin a veneer sheet which .1s corrugated or,wavy or sinuous zin transverse section and wh ch has a greater varietyof surface appearance;

thanis possessed by the surface of a veneer sheet cut by means of aknife having itscutting edge in a straight line. Furthermore, the veneersheet cut by a knife having the sinuous cutting edge cuts through thewood fiber at different angles. Thereby idifierent parts of the face ofthe veneersheet absorb in different proportions or! quantities oils,

. stains,'shellacs, and varnishesand other mas b rials used for g-theaceof the,

veneer sheet. This variationiin absorption is another factor ingiving'to the veneer sheet a Variety'of appearance.

My invention" relateslparticularly to the form of the knife anditheformof the pres i sure bar which cooperate in the" cutting the dischargeof the' veneeig; 7

In the accompanyingdrawings, I

Fig. 1 illustrates a c1. ss cutting machine or latheembodyingmyimprovement; i

' the knife and a part of the pressureibar positioned in relation toeach other, 1 v Fig. 3. is a perspective View of a partfof the' knifeshowing the sinuous cutting edge;

' ,7 Fig. 4 is an upright section on the line,

44., of Fig. 3, looking'in the directionfof the arrow; 7 p 1 7 Fig. 5 isa similar sectlonron'the hne, .5 5, I

of Fig-3, looking in the direction 'of the arrow, I135 Fig. .6 is ahorizontalsec-tion-on the line, 6.fi,.of Fig-5; a:

Fig. 7lillustrates one face ofa part ofa veneer sheet cut by my improvedmaChineL 1 Machines for cutting veneer by means of a knife and apressure bar are wellknown in this art. Hence it is considered-unneces-V sary to fully illustrate and describe such flap-Q machine. 7 r

Fig. 11 is atr'ansverse upright section of such a machineadapted tocutting-a veneer sheetfrom a log, the logbeing rotated,asis now done insimilar machines and the*Cl1t-:1 tingknife and the pressurexbfar beingstatlOnitlY. r

In the drawings, A is a lower-, horizontal, stationary frame member, andC is an upper, horizontal stationary Y frame member. I The girl" framemember, A, supports the knife andith'e frame member, C, supports thepressure bar.

Thesetwo frame members have their-ends immovably supported by the endsof the gem:

eral'structure ofthe niachine,as' is already f On 'saidifaceis a lug orbracket, A integral ":with the -member,iA.: The cutting knife, Byis go jplaced against said plane face above'the lug,

A 1 Any desired numberof lugsfA areto be placed on the flange, A belowthekn'ife.

A bolt, AF, is: threaded upward through i the "lug, A :andfrnade to bearagainst the lower 855 edge iof. the knife. "Byl' turning said boltfso Vas to varyits"height,;the height ofthefiknife through a, slot, B (Fig;2) "and is threaded into the i frame memberfA. "A nut,'iA*," sur- .330

Fig 2 is a perspectigelshowinga a lrounds the outer part of saidboltandtii'sio be'driven toward the member, A,;for binding theknifeagainstsaid 'memberiwhenz the kiiife has been "adjusted tothedes1red heightt=b means of thebolt', A Any number of-su 3.5

bolts, A and slots, B*, are tojlbe u'sed. 1 e

fl g anilippergfler F300 extends upward and toward the right so as tostand in a plane which forms an acute angle with the plane of the flane, C The 7 frame member, 0, is so positione as to bring I f theintersection of those planes close to the edge of the cutting knife, B.At the junction ofihosevthe membenfl is chan-fi :eledb flint W toreceive the pressure downward-directed face, C and extending u is cutaway far enough to receive the clamp- G; cutting away to make'noomior'this late, a shoulder, C is formed on A n, whieheonetitutee ian,abutment for the a jacent edge of the clamping c fiaidjilate overlaps apart ofthe presi r a Since the pressure bar extends belowthe adiace'ntface of the mem Ln, fie'owerlapping part of the clamping the pressurebar and not face of the member, C. Adjacent theshonliz-67 5116 M M 'ngplate-bears against said I A b812,: extends obliquely upward clampingplate and the adjacent at the frame member, C, and serves to plateagainst the pressure we knife, B. new and; just billin is to be againmade tight.

. of the knife, B, which. rests 1. {ace of the framemem- M A ds 'in a uno '"which slightl -cut'sthe lh'lwflieh'is close to the wailing-edge B,is beveled-so as to red; near the I permi -the faced the log, L.

cutting of m nia, B, were the w e ofithe adjaoentafaoe 7 r,'.A, orparallel toor matjflanalhhe knife would but a straight am (from therotating log; and

dumb; would benpproximately parallel f) Q)!! hyets in the log, andtheveneer would befldt and not sinuous or wavy.

' n. '2 4915, show the form of knit: whereby the knifeis-adaptu duo-mnew sheet in wavy or sinuous in $1 in fiber layers. l

. hmthis outting lmi'fe,a steel plate of a propritwe thickness and"length and disused. For the* purpose of ezrplana- QM, i is med thattheupper edge of D, said bar resting against a horizontal downward a littlethe adiacent partof the lower face of the member, C. \From.

the pressure bar toward the free edge of the flange, C, thelower iaoeofthemember,

cutting main an the plane of the up I from which the knife 15 formed,'sairl ad'peentpart of .the adjacent v .i r and madeto bear against thethe; Weber. The opposite side of 1m ,flfflm aesuoh ententas may henecessary when the the plate is straight and flat and in a lane whichisperpendicular to the body 0 said plate. i

In Figs. 3, 4 and 5, the beveled face of the cutting knife is shownturned toward the "right. In Fig. 2, it is shown toward the iront or.left. To illustrate the manner of de wlopingahe sinuous or wavy cuttingadge, let

it he assumed that alternate portions of the part ofthat face are madeslanting totheopposite face of the knife a disward tance equalling thedistance at which parts of the cutting edge, 13, are to stand fromtheplane of the straight face of the knife. And let it be assumed thatthe beveled face of theoattingknife lissimila'rly outon:s'eotionsalternating the cat sections of the oeite .faoe ofthe knife,this cutting on a tel-ed fice being only enough to fformn redge olflthelane being perpendiculartoithe body ofthe 5 Whose cuttingsat each eideofthe knifieare *to been curved as to make the cutting edge sinuous orwaveform, the deviation from n straight line being only asmnch as will'causesuch tlifierence in depth voi cutting into the surface as will presenton the veneer sunfaoe the desired fiberi variation.

1 fl he function of the pressure bar, D, press upon and to mmeclegreecondense the :logrsurfiace immediately above the cutting iodgeof theknife, B. The approximately "u night or side iface oi thepressure bar isma .wavy *to conform to the waves orsinuousities the uprightface of theknife, B, inorder that the gap or passage between the pressure bar andthe cadzting edge of the knife .may be heiferand in order that thepressure by flnepmssnre bar upon the wood. may be approximately uniformon all parts of the sbeet wpassing firomrthelog. In other word-s, the

which is sure bar is to present an edge pamlzlelstn 'the sinuous lknifeedge. a

To attain that parallelism, 1thelovwerfaee ssune bar is also to he madesinuous are baris'in a plane which iisut an mgie of less thanninetyedegneesto the {dune of edge, the metal being allowed rte re- 1llii the adjacent face of the cutting knifie, B.

Thecmtingedgewof. the knife being ina lnori- .zmital plane, andthepressure bar being in clined, as above described, the abovementionedarallelismgcan be attained only by also we ing the lower face of thepress me bar sinuous,

But the planeof the knife edge and the inl'inationof the pressure barmay sore- 1mm to each other as to allow making only the, upright face ofthe pressure bar smnous to create the parallelism above described;

It is to be notedthat as soon as a cnt ass 'eeemmaaaeme the iegjthe logwiflhave 2 other, and means for "supporting abody of a sinuous surfaceconforming to the sinuosities of the pressure bar. Then all partspressure baredge will bear on the. I

- bination of a flat-faced knife body havinga t to the knife body, apressure bar in a plane forming an angleless than ninety degrees to ofthe wood. g

The veneer sheet, V, issuing from the edges of the knife, B, and thepressure bar, moves" away between the upper frame member, C,

and the lower frame member,A. Said sheetL may descend from thepositionshown in Fig.

1 and slide on any. number of supports, A7, seated on the outeredge, AF,of'the frame member, A.

I claim as my invention I 1. In a veneer cutting machine, the combmationof a knife having a'sinuous cutting 1 edge, a pressure bar having asinuous edge conforming to the cutting edge of theknife, means forsupporting the knife and the pressure'bar in relation to each other, andmeans for supporting abody of wood, said means and the knife andpressure bar supporting means being adapted to impart relative movement.7

2. In a veneer cutting machine, the combination of a knife having asinuous cutting edge, a pressure bar having two sinuous faces forming anedge parallel to said cutting edge of the knife, means for supportingtheknife and the pressure bar in relationto each wood, said means and theknife andpressure bar supporting means being adapted'to impart relativemovement. a

3. In a veneer cutting-machinm-the combination of a flat-faced knifebody having a sinuous cutting edgeinga planeperpendicular I to the knifebody, a pressure bar having a sinuous edge conforming'to the cuttingedge of the knife, means forsupportingtheknifes and thepressure bar inrelation to each other,

and means for supporting'a body of wood,

said means and the knife and pressure bar supporting means being adaptedto impart relative'movement. v H V 4a In aveneer cutting machine, thecombination of a fiat-facedknife body the upper part of which has itssides'grooved alternately to form a sinuous knife'edge, a pressure barhaving a sinuous edge conforming to the cut-V ting edge of the knife,means for supporting the knife and the pressure bar in rela .tion toeach other, and means for support pressure barsupporting means beingadapted to impart relative movement. 6-. In a; veneer cutting machine,the comsinuous cuttingedge in a plane perpendicular bination of a knifehaving a sinuous cutting edge, extending to a plane transverse totheknife andhaving an edge which is sinuous to conform to the sinuositiesof the knife 8. In a veneer cutting machine,.the com- 'bination of aknife having a sinuous cutting edge extending to a plane transverse tothe body of'theknife, and a pressure bar having an inolined'facedirectedtoward the position" for the Ilog and the lower part of said inclinedface being near the cutting edge of the body of the knife, and a"pressure bar having an inclined face directed toward the position forthe log and said pressure bar having a lower face meeting said inclinedface near the cutting edge of the knife and said inclined face and saidlower face being sinuous and forming a sinuous edge at their junctionthe sinuosities of which edge conform to the sinuosities of the cuttingedge of the knife.

7 9. In a veneer cutting machine,the combination of a knife having aflat body and having a sinuous cutting edge in a plane approximatelyperpendicular to'the body of the info, a pressure bar having'a sinuousedge conforming tothe cutting edge of the knife,

means for supporting the knife and the pres sure bar in relation to eachother, and means for supporting a body of Wood, said means and the knifeand pressure bar supporting means being adapted to impart relativemovement.

V In testimony whereof'I have signed my name, this 21st day of December,in the year one thousand nine hundred and twenty-seven.

JOSEPH T; MENGEL.

ing a body of wood, saidmeans and the knife 5. In a veneer cuttingmachine, the com.- bination of a flat-faced knife body the upper part ofwhich has its sides grooved alternately to from a sinuous knife edge ina plane perpendicularto the knife body, a pressure bar'having a sinuousedge conforming to V the cutting edge of the knife, means forsupportingthe knife and the pressure bar in relation to each other, andmeans forsupporting a body of wood, said meansand the knife and

